jag trasgo helsinki091002
DESCRIPTION
Juan Antonio Garzón talk about the Trasgo detector.Helsinki, October 2009.TRANSCRIPT
An Innovative Detector for the measurement ofHigh Energy Cosmic Rays
J.A. Garzón Heydt. Univ. Santiago de [email protected]
M. A. López Agüera. Univ. Santiago de Compostela
Research Project : New lines of work
Project
Proyecto
Meiga
DAQ ElectronicsNetwork
Power supplies
Modular design
The Trasgo is an innovative detector based on timing RPCs suitable for measuring high energy particles with timing, tracking and some particle identification capabilities.
Main ingredients:
- timing RPCs, affordable to cover big surfaces and with time resolution ~100ps.
- TimTrack: Fast tracking algorithm with capability of reconstructing the space coordinates and direcions, velocity and time arrival (TimTrack)
- MIDAS: Some capability of separate cosmic muons, electrons and protons by a multisampling method(Midas)
- GSI-TRB The GSI-TRB Data Acquisition board with capability of reading 128 FEE channels
TRASGO Project : The concept
RPCchamber
~900mm
(Aproximate layout)
~900mm
TRASGO Project : Ingredients. The timing RPC
Proposed RPC cells properties:Simplification of the HADES RPC design:
- 2-gap cells with alternate glas-aluminum-glas plates- 0.3mm gap width- Planes with 4 chambers of ~20cmx80cm- Standard gas mixture: Freon-SF6-Ibutane, 85/10/5
Main RPC requirement:- Time resolution < 100ps
Chamber
Plane
Chamber detail
Strip or Cell
T readout
T’ readout
Chamber side view
Gas flow
HV
Al
Glas
Glas
Cell
Strip
IsolatingCover
13 HADES RPC cells and FEE electronics ready for tests
1 readout channel
TimTrack is a fast LSM algorithm for the tracking of charged particles providing:
- Particle arrival position and slopes(X0,X’,Y0,Y’)
- Particle arrival time (T0)- Particle velocity (V)
We call SAETA (Smallest ArrangEment of daTA)each set of the 6 parameters (direction, offset time and velocity) provided by the algorithm
TRASGO Project : Ingredients. TimTrack
DAQ and
Power Supplies
TRASGO Project : Ingredients. TimTrack
Analytical LSM fit of tracks providing 6 parameters: X0,X’,Y0,Y’,T0,V
Y
X
Y0
X0
X’
Z
Y’T0,V
T1
T’1
T’2T2
E1
E2
Z1
Z2
k coefficients: Dependent on the layouta coefficients: Dependent on the data
Data: Ei, Ti, Ti’Parameters: X0,X’,Y0,Y’,T0,V
TRASGO Project : Ingredients. TimTrack
Trasgo’s resolutions (β=1. Units: ps, cms and radians)
1 TRB / 128 channels 2 TRBs / 256 channels
δtRPC Planes/Trasgo δT0 δv/v(%) δx δx’ δT0 δv/v(%) δx δx’
4 70 7 9.4 0.03 70 7 5.4 0.02
6 58 5 9.9 0.04 58 5 6.0 0.02200ps
8 50 6 10 0.04 50 6 6.5 0.02
435 3.6 7.1 0.024 35 3.6 4.7 0.02
630 3.1 6.9 0.025 30 3.1 5.0 0.02
100ps
825 3 6.4 0.024 25 3 5.1 0.02
MIDASTRASGO Project : Ingredients. MIDAS
Muon Electron
Time delay and Chi2 analysis
MIDAS performs a comparative analysis of fit quality and velocity
MIDAS: Multisampling IDentification of pArticles
Simulation done with Matlab/Octave including:- Multiple scattering [PDG]- Energy loss (Bethe Bloch)- Detector resolution
Mean Flux of Cosmic Rays at the Sea Level(I: Flux in m-2s-1sr-1, R: Range in cm-Pb)
Electrons Muons Protons PhotonsEGeV
I ∆I I ∆I β I ∆I β I ∆I
0.1 6 99 0.87 1.9 0.43 8
5 13 1 6.9
0.5 1 86 0.986 0.9 0.76 1.1
0.6 17 0.4 0.7
1 0.4 69 0.996 0.5 0.87 0.4
0.3 23 0.25 0.3
2 0.1 46 0.999 0.25 0.95 0.1
0.08 26 0.15 0.08
5 0.02 20 0.9998 0.1 0.987 0.02
1011.4
8.6 0.99995 0.03 0.996
Trasgo. Ingredients: The GSI-TRB (Tdc Readout Board)
Optical link to other TRBs
4x32 channels
4 x 32ch/HPTDCs(4xFPGAs in future versions)
ETRAX Processor
Ethernet (100MBits/s)
Buffer memories
FPGA (Board controller)
Data Input
Link to externalcomputer
Trasgo. Ingredients: The GSI-TRB (Tdc Readout Board)
EthernetTwisted pair flat cables
RPC signals
HADES RPC cells
Acquisition board
TRB
MB
MB
DB
DB
DB
DB
DB
ExternalComputer
General Layout of the Data Acqujsition in HADES and TRASGO
Trasgo. Ingredients: The GSI-TRB (Trigger & Readout Board)Hades experiment, RPC Test with cosmics at GSI
Research Project : New lines of work
ProyectoMeigaProject
E=1015eV1 Particle/m2.year
E=1018eV1 Particle/Km2.year
E=1020eV1 Particle/Km2.century
The Primary Cosmic RaysFluxes
Primary Cosmic Rays: Energy and Mass
Knee
The scatter of points on a plot of the average logarithm of the nuclear mass number of the primary cosmic rays versus energy clearly shows the need for more input from accelerators.
[CCOU02]
Secondary Cosmic Rays: Composition
MEIGA facility(Multipurpose particlE Identifying trasgOs Array)
Trasgos
MEIGA is an array to test the Trasgos performances measuring Cosmic Ray showers around de Knee.1st. stage MEIGA-1 to be installed in the Campus with ~ 10 Trasgos (3 years)
MEIGA facility: Data acquisition structure
1
3
2
5
4
8
6
7
3
12
4
?
44
Meiga facility: Some multiplicity estimates
TRASGO and MEIGA capabilities for Cosmic Ray PhysicsEAS Characterization:- Lateral distribution measurement- Multiplicity and density measurement - Time and spatial structure of the shower- Some identification of particles
Possible tasks of interest for Astroparticle Physics (MEIGA2 and further):- Sistematic shower measurement: structure, rate….- Time structure of nucleons: i.e. EPOS model and others- Analysis of the front of the EAS: L. Cazón model- Calibration of Cherenkov tanks of P. Auger South and North?
Advantages / Disadvantages of TrasgosCons:- High ratio Price/Volume or Price/Surface- High power consumption: To big photovoltaic cells needed (1st. stage)Pros:-Multiparametric data: strong interpolation capabilities (needs enough density)
- Good for testing simulation packages - Some Identification of particles: electrons/muons/protons- Modular. Easily extendable and portable- Infrastructure developed for Trasgos could be easily extended to other purposes/detectors
MEIGA-2 with 36 TRASGOS
MEIGA-2 Compared to Kascade
- Possible extension of MEIGA-2 withP. Auger tanks
(Possible use of MEIGA-2 for the analysisof the performances of the P. Auger tanks
Temptative Trasgo and Meiga shedule
1st stage (3 years) 2nd stage
Timing RPCs cells 2 gaps / 200 ps 2 gaps / 100ps / Sealed
FEE Electronics HADES FEE Low consum upgrading
Tracking TimTrackImplementation in FPGAs
TimTrackImplementation in GPUs
Particle Identification MIDAS MIDAS + Particle Probability
Data Acquisition TRB/HPTDCs TRB/FPGA (GSI)
Shower reconstruction First naïve version Shower reconstructionSoftware development
Meiga ~ 10 Trasgos 20 – 50 Trasgos
Meiga Low density Medium/High Density
The Meiga Collaboration
- The Meiga Collaboration -List of representatives
-Univ. of Santiago de Compostela / Spain-J. Díaz Bruguera: G. Arquitectura de Ordenadores / Dept. Electronics-V. Pérez Muñuzuri: G. Meteogalicia / Dept. Materia Condensada-J.A. Garzón Heydt: G. LabCAF / Dept. Particle Physics-E. Zas Arregui: G. Astroparticle Physics / Dept. Particle Physics
-Univ. Coruña / Spain-A. Yañez Casal: G. Aplicaciones Industriales del Laser / E. Politénica de Ferrol
-Univ. Vigo / Spain-A. Ulla Miguel: G. Astronomía y Astrofísica / Dept. Física Aplicada
-LIP-Coimbra / Portugal-P. Fonte: RPCs development group
-Engineering Company-R. Lorenzo: Tecnociencia / Ames- Spain
TRASGO DEVELOPMENT: TASKS DISTRIBUTION
- Trasgo design: labCAF/USC- tRPCs development: labCAF/USC +LIP/Coimbra- Electronica FEE: labCAF/USC- TRB modifications: labCAF/USC, G. Arquitectura de Ordenadores/USC + GSI - Tracks reconstruction Software : labCAF/USC- Trasgo box design and manufacturing: G. Aplicaciones del laser: E. Politecnica-Ferrol/UDC- Power supply development: G. Astropartículas/USC + TecnoCiencia- MonteCarlo development: GAstroparticulas/USC + labCAF/USC- Data Analysis: G. Astroparticulas/USC + labCAF/USC- C.Rays-Climate correlations analysis : G. Astronomia y Astrofísica/ U.Vigo :
S. MeteoGalicia/USC-Xunta de Galicia
Trasgo-Meiga Project. Summary of Benefits
-- Development of a new technology detector:--- Analysis of Cosmic Rays around de Knee
- - Test of new technologies useful for HEP and N. Physics- - TimTrack:
- - MIDAS:
-- Development of a small facility in the campus of the U. Santiago de-Compostela
-- 1st. step of a bigger hybrid (+ some P. Auger tanks or other- detectors) facility? Possible seed of a new CR facility in elsewhere- (F.ex. H.E. Gamma Array in Pirenees or S. Nevada) ?
- Other fields: Climate studies, Muon reconstruction improvement in HEPSpectrometers, CR dosimetry in Computing centers …
- - Training of Ph.D and PostDocs in the development of detectors and new - technologies and techniques related with the detection, measurement- and reconstrucion and analysis of EAS
THE END
Somewhere over the rainbow, skies are blue
And the dreams that you dare to dream , really do come true
(The Wizard of Oz)